Investigation EA98024: 1996–1997 Chevrolet Chevrolet Truck

Status

CLOSED

Opened

Nov 10, 1998

Closed

Apr 20, 2000

Model years

1996–1997

Subject

Fuel leaks from the vapor canister

Component: Vehicle speed control › Linkages

Summary

In January 1998, GM issued the technical service bulletin describing conditions which may result in fuel leakage from the emission vapor canister.According to the bulletin, when the subject vehicles are parked on an incline, with a full tank of gasoline, fuel can flow into the vapor canister.The remedy is to replace of the vapor canister, both rollover valve assembles, and the associated piping.In April 1998, ODI opened Service Query 98-005 to understand GM's rationale for issuance of a service bulletin on a matter that appeared to result in fuel leakage, an issue that is usually address by conducting a safety recall campaign.On November 10, 1998 the SQ was elevated to an Engineering Analysis (EA98-024) to investigate an alleged defect in the fuel tank rollover valve system in certain 1996 through 1997 Chevrolet Trucks and OMC Full Size 010-030 panel and passenger vans.

An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.

Model years covered

• 1997 Chevrolet Chevrolet Truck48 complaints
• 1996 Chevrolet Chevrolet Truck49 complaints